9Major Operating Controls and Their Functions(1) LCDDisplays the extension unit's status (errors etc.) andfunctions that are operated using the buttons on the frontpanel.(2) HDD indicators ("HDD1" to "HDD9")HDD access indicator (right side)Indicates the access status and problems of the HDD.When errors occur on an HDD in RAID5/RAID6 mode, theindicator lights or blinks red.The indicators display the status of each of the drives fromHDD1 to HDD9, but if a system errors occur, each indicatorhas the same display.HDD status indicator (left side)Shows the operating status of the HDDs.(3) Key holeUse to open and close the front cover.Keep the key in a safe place.Front View(3)(2)(4) (5) (6) (7) (8)(1)(9)Blinks green : Accessing HDDOff : Not accessing HDDLights red : Errors have occurred on HDD(Data can be recovered by replacingHDD)• When in RAID5 mode, the first HDDhas errors• When using RAID6, the first twoHDDs have errorsBlinks red : Errors have occurred on HDD(Data cannot be recovered even ifHDD is replaced)• When in RAID5 mode, the secondHDD has errors• When in RAID6 mode, the third HDDhas errorsLights orange andred(Alternately): Recovering data from drive in RAID5/RAID6 mode.(This indicator looks orange duringhigh-speed processing.)Important:• When the HDD indicators light red in RAID5/RAID6 mode,quickly replace the HDD where the errors occurred. Contactyour dealer for information on replacing HDDs.⋅ RAID5 mode:Data cannot be recovered when two or more HDDindicators are lighting or blinking red.⋅ RAID6 mode:Data cannot be recovered when three or more HDDindicators are lighting or blinking red.Lights green : HDD power [On](HDD formatted)Blinks green : HDD for playback only(only for playback, recording not possible)Blinks orange : Formatting HDDLights red : HDD format failedOff : HDD power [Off]HDD is not connected or not recognized.Lock : Turn key to left.Open : Turn key to right.